Ok, So I have a 2011 F150 Platinum Super Crew Tow value of 7700 LB. 5.5 foot bed, 5.0 engine 4x4 2 inch leveling kit with 35x12.50x20 10 ply tires. I am thinking of purchasing a Jayco 29RLS that is ...
The max an F150 5.0 4x4 Crew Cab can tow in that year is 9,300 lbs with a 3.73 rear end. The 3.55 rear end is rated at 7,700 with all else being the same but the rear end gear ratio. Maybe a 4.10 gear swap might put you where you need to be.